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Indicator, Surface Position (SPI), Shuttle, Columbia

Smithsonian's National Air and Space Museum

Smithsonian's National Air and Space Museum
Washington, DC, United States

This surface position indicator (SPI) instrument was removed from the Space Shuttle Columbia during its upgrade to an electronic "glass cockpit" in 1999-2000. It displays the actual and commanded positions of the elevons, body flap, rudder, aileron and speed brake. The SPI instrument is active during entry and landing and during the entry portion of emergency return-to-launch site phases of flight.NASA transferred the set of Columbia's old cockpit instruments to the Museum in 2005.

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